This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X78, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI32 Standard Air Cylinder SI32X78
The AirTAC SI32 Standard Air Cylinder SI32X78 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 78mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X78, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke78 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X78
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI32 Standard Air Cylinder SI32X78
The AirTAC SI32X78 is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 78mm stroke. Delivering 402N push force at 0.5MPa via a G1/8 port, it is replaced by the SAI32X78. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force and port for existing fixtures.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this SKU lacks a magnet (-S) so it cannot accept a CS1-B/DS1-B sensor. For high heat, Viton H seals raise the temperature limit to 150C.
Airtac SI32 Standard Air Cylinder SI32X78 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X78 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X78 |
| Bore size | Ø32 mm |
| Stroke | 78 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 27 mm |
| Max standard stroke | Up to 1000 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI32X78 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The SAI32X78 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI32 Standard Air Cylinder SI32X78
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×78 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI32 Standard Air Cylinder SI32X78 Is Used
Small Part Ejection
Ideal for pushing lightweight machined components out of a fixture with a safe 241N working load.
Package Diverting
Sort small boxes on a line using the 78mm stroke to actuate a routing gate at high cycling speeds.
Clamp Actuation
Secures low-mass workpieces under 20kg during light assembly or drilling operations.
Replacing the Airtac SI32 Standard Air Cylinder SI32X78 with the SAI32X78
To replace the SI32X78, order the SAI32X78. Verify your ISO 15552 mounting accessory (LB foot, FA flange, TC trunnion) and confirm the G1/8 port thread (PT/G/NPT). Because this specific SKU has no magnet, it cannot support position sensing; if you need switches, select an SAI32X78S and use current AirTAC switches. Sizing both ways: the 32mm bore yields 402N push at 0.5MPa, while a neighbouring 40mm bore provides 628N. The 78mm stroke is standard. A plain cylinder does not hold load without live air; for load holding on air loss, use an external pilot check valve or explore the SAIL lock and BSAI clamp-lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X78
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI32 Standard Air Cylinder SI32X78 FAQ
Yes, the AirTAC SI32X78 is discontinued. The direct replacement is the SAI32X78. It is dimensionally interchangeable per ISO 15552, matching the 32mm bore, 78mm stroke, 402N force, G1/8 port and mounting interface, so it fits existing fixtures perfectly.
The 32mm bore has a G1/8 port. Force outputs are: 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical max of 82kgf at 1.0MPa. Operating speed is 30-800mm/s.
Request a Quote for the SAI32X78
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X78 replacement — usually within 7-8 hours.